CN201160024Y - Magnetic core and integrated electrical inductance - Google Patents
Magnetic core and integrated electrical inductance Download PDFInfo
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- CN201160024Y CN201160024Y CNU2008200446050U CN200820044605U CN201160024Y CN 201160024 Y CN201160024 Y CN 201160024Y CN U2008200446050 U CNU2008200446050 U CN U2008200446050U CN 200820044605 U CN200820044605 U CN 200820044605U CN 201160024 Y CN201160024 Y CN 201160024Y
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Abstract
The utility model belongs to the technical field of the magnet and inductor. The utility model solves the problems that the inductors in the filter are excessive, the production procedure and the assembly are complex, and the wrong assembly is easy to occur. The magnetic core comprises a magnet (1) and a magnetic plate (5) which can lean against the side wall (3) and the end surface of the column cores (4), wherein, an end surface (2) is arranged on the magnet (1), side walls (3) are arranged at the both side edges of the end surface (2), at least two outstretched column cores (4) are arranged on the end surface (2), and the end surface of the column cores (4) and the magnetic plate (5) directly keep a magnetic clearance (11). Or the magnetic core comprises two magnets (1) and a magnetic plate (5) which is arranged between the two magnets and can lean against the side wall (3) and the end surface of the column cores (4). A first coil (7) and a second coil (8) are arranged on the column core (4) of the magnetic core, the first coil (7) and the second coil (8) on each column core (4) are respectively and mutually connected in series, and the both ends of each coil are respectively arranged on a pin (9).
Description
Technical field
The utility model belongs to magnet and inductance technical field.
Background technology
Existing inductance has and adopts as EI, and the isostructural magnetic core of EE, these magnetic cores have only a newel, are provided with coil on this newel, constitute inductance thus.And in filter circuit, often adopt a plurality of inductance to be serially connected in the two-wire, therefore need use many to inductance, naturally cause and use the quantity of device to increase, cumulative volume is big, and the space that occupies is big, because the inductance value difference of employed inductance, for easily manufactured, the manufacturer often adopts the coil of the different number of turns of coiling on identical magnetic core, causes inductance all identical in shape, only the number of turns difference of coil coiling therein.Use this independent one by one inductance component to produce electronic product, increase as the usage quantity that will cause inductance component in the production process of filter, the operation of processing increases, and makes assembling complicated, and is easy to generate assembling and makes mistakes.
The utility model content
First purpose of the present utility model is to provide a kind of and concentrates in together for a plurality of inductance, and can form a plurality of independently inductance, and the magnetic core of being convenient to make up.
Second purpose of the present utility model is to provide a kind of and forms a plurality ofly, and is separate, is convenient to the integrated inductor of combination results.
For realizing first purpose of the present utility model, described magnetic core, comprise a magnet, described magnet is provided with an end face, edge in described end face both sides is provided with sidewall, described end face is provided with at least two post cores that extend out, the magnetic sheet that can lean against on sidewall and the post core end face, and described post core end face and magnetic sheet directly maintain magnetic gap.
Utilize above-mentioned magnetic core, can realize second purpose of the present utility model, described integrated inductor, comprise a magnet, described magnet is provided with an end face, edge in described end face both sides is provided with sidewall, described end face is provided with at least two post cores that extend out, the magnetic sheet that can lean against on sidewall and the post core end face, described post core end face and magnetic sheet directly maintain magnetic gap, on each post core, be provided with two-wire and around first coil and second coil, first coil on each post core is connected mutually, second coil on each post core is connected mutually, and the two ends of each coil are separately positioned on the pin.
Because end face is provided with sidewall and at least two post cores that extend out, when being wound with coil on the post core, then the magnetic field of this coil generation when energising can form a magnetic circuit at post core, end face and the sidewall at its place.Because all post cores all are arranged on the end face, when being wound with coil on these post cores, the magnetic field that these coils produce when energising has only sub-fraction to utilize end face to pass on other the post core, and most of end face, sidewall and magnetic sheet of can passing through forms a magnetic circuit.Therefore, can form a plurality ofly in magnetic circuit, and be separate post core, when be wound with coil on each post core, can form a plurality of independently inductance.
For realizing first purpose of the present utility model, described magnetic core, comprise two magnets, described magnet is provided with an end face, edge in described end face both sides is provided with sidewall, described end face is provided with at least two post cores that extend out, and one is arranged on the magnetic sheet that can lean against between two magnets on sidewall and the post core end face, and described post core end face and magnetic sheet directly maintain magnetic gap.The difference of this magnetic core and above-mentioned magnetic core is many magnets.Can form than last one times separate post core more than.
Utilize above-mentioned magnetic core, can realize second purpose of the present utility model, described integrated inductor, comprise two magnets, described magnet is provided with an end face, edge in described end face both sides is provided with sidewall, described end face is provided with at least two post cores that extend out, one is arranged on the magnetic sheet that can lean against between two magnets on sidewall and the post core end face, described post core end face and magnetic sheet directly maintain magnetic gap, on each post core, be provided with two-wire and around first coil and second coil, first coil on each post core is connected mutually, second coil on each post core is connected mutually, and the two ends of each coil are separately positioned on the pin.The difference of this integrated inductor and above-mentioned integrated inductor is many magnets.Can form than a last integrated inductor and Duo one times separate inductance number.
If adopt two magnets, directly make its sidewall and the closing of post core end face form a magnetic core together, the magnetic core that form this moment is than adopting a magnetic core and the magnetic core that magnetic sheet forms, elongated relatively one times of its post core, therefore can be on the post core the twice coil of coiling.So can by various combination, can form the magnetic core of different size according to producing needs to magnet, magnetic sheet, different coils is set in these magnetic cores, be convenient to the integrated inductor of combinations produce all size.
Above-mentioned magnetic core and integrated inductor thereof are because employing is provided with sidewall in a plurality of post cores periphery, therefore sidewall is in order to be trapped among by the post core, inevitable along with the post core must increase or increase and correspondingly increases sectional area, make a plurality of post cores can use the path of sidewall jointly as magnetic loop, by adopting common side-wall to solve the original sidewall separately of each post core, reduced volume greatly, because sidewall is arranged on the periphery of post core, this sidewall also has the effect of shielding magnetic radiation.
Description of drawings
The drawing of accompanying drawing is described as follows:
Fig. 1 is the three-dimensional structure diagram of first embodiment of the utility model magnetic core.
Fig. 2 is the three-dimensional structure diagram of second embodiment of the utility model magnetic core.
Fig. 3 is the distribution schematic diagram of the magnetic line of force in magnet between two post cores adjacent among Fig. 1 and 2.
Fig. 4 is the distribution schematic diagram of the magnetic line of force in magnet between two post cores concentric among Fig. 2.
Fig. 5 is the three-dimensional assembly structure figure of first embodiment of the utility model integrated inductor.
Fig. 6 is the three-dimensional assembly structure figure of another integrated inductor embodiment of adopting among Fig. 5 two magnetic cores and making up.
Fig. 7 is the three-dimensional structure diagram of second embodiment of the utility model integrated inductor.
Fig. 8 is the three-dimensional assembly structure figure of Fig. 7.
Fig. 9 is Fig. 5,6 circuit interconnect pattern.
Figure 10 is the circuit interconnect pattern of Fig. 7.
Figure 11 is that integrated inductor shown in Figure 7 is applied in an example circuit figure in the filter circuit.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the utility model magnetic core and integrated inductor thereof is described in further detail:
At first narrate magnetic core.
As shown in fig. 1, magnetic core described in the utility model comprises a rectangular-shaped Ferrite 1, described magnet 1 is provided with a rectangular end face 2, is provided with sidewall 3 at the edge of described end face 2 both sides, and described end face 2 is provided with two post cores 4 that extend out.As required, also can on end face 2, be provided with a plurality of post cores 4 that extend out.The magnetic sheet 5 that can lean against on sidewall 3 and post core 4 end faces, described post core 4 end faces and magnetic sheet 5 directly maintain magnetic gap 11.When magnet 1 and magnetic sheet 5 were assembled together, this magnetic core was shown in magnet 1 or following magnet 1 above among Fig. 4 and magnetic sheet 5 formations.
When one of them post core 4 was provided with the coil of energising, the magnetic field of generation represented that with the magnetic line of force shown in the dotted portion among Fig. 3, the magnetic line of force will pass from an end of post core 4, then on the end face 2 to around scatter.Because sidewall 3 shapes become flat, are distributed in the edge of end face 2, therefore can collect the most of magnetic line of force that passes from post core 4 one ends.The distribution of the magnetic line of force in sidewall 3 mainly is distributed in apart from the big sidewall 3 of the near sidewall 3 of this post core 4 and sectional area.Though extend out and another post core 4 is faces from end face 2, and it is approaching with a last described post core 4, but owing to be provided with magnetic gap 11 between another post core 4 and the magnetic sheet 5, this magnetic gap 11 has sizable magnetic resistance with respect to sidewall 3, and the magnetic line of force that a therefore last post core 4 produces only has a part seldom can pass through this post core 4.When the cross-sectional area of both sides sidewall 3 was identical, the distribution of the magnetic line of force in end face 2 mainly concentrated on the post core 4 corresponding sidewalls 3 on one side that produce the magnetic line of force, because corresponding on one side sidewall 3 distance post cores 4 are near, magnetic resistance is little.Another post core 4 is owing to only occupy the sub-fraction area of end face 2, and because the existence of the magnetic gap 11 between post core 4 and the magnetic sheet 5, magnetic resistance by these post core 4 magnetic circuits is big, therefore only can collect through the sub-fraction in the magnetic line of force on these end face 2 the right, shown in the dotted portion between two post cores 4 among Fig. 3.Major part in the magnetic line of force on the right forms magnetic loop through magnetic sheet 5 again through the sidewall 3 on the right.So the mutual inductance between two post cores 4 is very little, and the like, the situation of a plurality of post cores 4 also is like this.
Described two sidewalls 3 prolong end face 2 edge on one side and extend rear wall 6, form holistic half.As shown in Figure 3, at this moment, each post core 4 in the magnet 1 separately a side have can magnetic conduction the wall sectional area obtain enlarging, as sidewall 3 and rear wall 6, therefore, after the magnetic line of force in the post core 4 passes from an end, will penetrate to sidewall 3 along three directions, only there is sub-fraction in adjacent post core 4, to penetrate,, bigger extending space can be arranged because sidewall 3 occupies the marginal position at end face 2, its sectional area can be much larger than the sectional area of post core 4, therefore can guide a large amount of magnetic lines of force from sidewall 3 and rear wall 6 processes, thereby avoid directly passing through of the magnetic line of force between the adjacent post core 4, reduce the mutual inductance between the post core 4.
At two coils of two post cores, 4 difference coilings, when being equivalent to two inductance L 1 and L2 magnetic spare and being integrated together, because influencing each other of the magnetic flux that two post cores are 4, the inductance value of this L1 and L2 is compared with the inductance that two magnetic cores that are separated from each other form can produce certain skew, is compared as follows by the actual test to 10 sample inductance values:
| Project | L1 inductance value (mH) | L2 inductance value (mH) | L1+L2(mH) | The two is connected in series measured value | Deviation % |
| |
4.763 | 5.015 | 9.778 | 9.413 | 3.88％ |
| |
4.985 | 4.744 | 9.729 | 9.367 | 3.86％ |
| |
4.713 | 4.830 | 9.543 | 9.189 | 3.85％ |
| |
4.876 | 4.748 | 9.624 | 9.260 | 3.93％ |
| Sample 5 | 4.904 | 4.716 | 9.620 | 9.326 | 3.15％ |
| |
4.748 | 4.937 | 9.685 | 9.380 | 3.25％ |
| Sample 7 | 4.830 | 4.877 | 9.707 | 9.377 | 3.52％ |
| Sample 8 | 4.868 | 4.810 | 9.678 | 9.360 | 3.40％ |
| |
4.935 | 4.966 | 9.901 | 9.583 | 3.32％ |
| Sample 10 | 4.960 | 4.982 | 9.942 | 9.638 | 3.15％ |
As above test learns that actual deviation and theoretical value L1+L2 (mH) exist metastable error range, but by the fine setting number of turns, still reaches the characterisitic parameter requirement of this filter.Integrated as can be seen back inductance produces about 3%～4% variation, because the error of inductance value was generally 8%-10% when filter was made, so it is less to change influence relatively, and can be by the fine setting winding number of turns near separating magnetic device, the value of the inductance that the magnetic core that promptly is separated from each other forms.
As shown in Fig. 2,4, magnetic core described in the utility model can also be to comprise two magnets 1, described magnet 1 is provided with an end face 2, edge in described end face 2 both sides is provided with sidewall 3, described end face 2 is provided with at least two post cores 4 that extend out, one is arranged on the magnetic sheet 5 that can lean against between two magnets 1 on sidewall 3 and post core 4 end faces, and described post core 4 end faces and magnetic sheet 5 directly maintain magnetic gap 11.
Because magnetic sheet 5 is arranged between two magnets 1.When the post core 4 of concentric position in two magnets 1 produced magnetic fields, as shown in Figure 4, the magnetic line of force at first entered into magnetic sheet 5 after passing from an end of post core 4.Because in a magnet 1, magnetic circuit distance between sidewall 3 and the post core 4 is littler than the distance of the magnetic circuit in another magnet 1, so it mainly is to diffuse to the edge by magnetic sheet 5 to periphery that an end of post core 4 passes the magnetic line of force, get back to end face 2 by sidewall again, form a magnetic loop, shown in doublet loop among Fig. 4, represent that most of magnetic lines of force are in this loop.Shown in single dotted line loop among Fig. 4, post core 4, end face 2 and sidewall 3 that expression only has the magnetic line of force of seldom measuring part to pass through the concentric position of another magnet 1 form magnetic loops, and the mutual inductance that this magnetic loop produces is minimum.So this structure can form a plurality of independently inductance, and be convenient to combination.
Then narrate integrated inductor.
As shown in Figure 5, described integrated inductor, comprise a magnet 1 as shown in fig. 1, described magnet 1 is provided with an end face 2, edge in described end face 2 both sides is provided with sidewall 3, described end face 2 is provided with at least two post cores 4 that extend out, the magnetic sheet 5 that can lean against on sidewall 3 and post core 4 end faces, described post core 4 end faces and magnetic sheet 5 directly maintain magnetic gap 11, on each post core 4, be provided with two-wire and around first coil 7 and second coil 8, first coil 7 on each post core 4 is connected mutually, and second coil 8 on each post core 4 is connected mutually, and the two ends of each coil are separately positioned on the pin 9.As shown in Figure 7, T1 is illustrated in first coil 7 and second coil 8 on one of them post core 4, and T2 is illustrated in first coil 7 and second coil 8 on another post core 4.Among Fig. 9 1., 2. ... 6. represent pin 9.
As shown in Figure 6, described integrated inductor, comprise two magnets 1 as shown in fig. 1, described magnet 1 is provided with an end face 2, edge in described end face 2 both sides is provided with sidewall 3, described end face 2 is provided with at least two post cores 4 that extend out, the post core 4 of two magnets 1 and sidewall 3 are staggered relatively respectively, can form a magnetic gap 11 between post core 4 and the post core 4, this moment the post core compare with sidewall a magnet increase by one times length, on the post core, be provided with two-wire and around first coil 7 and second coil 8, first coil 7 on each post core 4 is connected mutually, second coil 8 on each post core 4 is connected mutually, and the two ends of each coil are separately positioned on the pin 9.As shown in Figure 7, T1 is illustrated in first coil 7 and second coil 8 on one of them post core 4, and T2 is illustrated in first coil 7 and second coil 8 on another post core 4.Among Fig. 9 1., 2. ... 6. represent pin 9.
As Fig. 7, shown in 8, described integrated inductor, comprise two magnets 1 as shown in fig. 1, described magnet 1 is provided with an end face 2, edge in described end face 2 both sides is provided with sidewall 3, described end face 2 is provided with at least two post cores 4 that extend out, one is arranged on the magnetic sheet 5 that can lean against between two magnets 1 on sidewall 3 and post core 4 end faces, described post core 4 end faces and magnetic sheet 5 directly maintain magnetic gap 11, on each post core 4, be provided with two-wire and around first coil 7 and second coil 8, first coil 7 on each post core 4 is connected mutually, and second coil 8 on each post core 4 is connected mutually, and the two ends of each coil are separately positioned on the pin 9.As shown in Figure 10, T1 is illustrated in first coil 7 on one of them post core 4 and second coil 8 in one of them magnet 1, and T2 is illustrated in first coil 7 on another post core 4 and second coil 8 in this magnet 1.T3 is illustrated in first coil 7 on one of them post core 4 and second coil 8 in another magnet 1, and T4 is illustrated in first coil 7 on another post core 4 and second coil 8 in this magnet 1.Among Figure 10 1., 2. ... 10. represent pin 9.
Described two sidewalls 3 prolong end face 2 edge on one side and surround a whole shape.
Be arranged with coil rack 10 on the described post core 4, described pin 9 is arranged on coil rack 10, and first coil 7 of the above and second coil 8 are wound on the coil rack 10.
This integrated inductor uses in filter circuit as shown in Figure 11.
Claims (10)
1. magnetic core, comprise a magnet (1), described magnet (1) is provided with an end face (2), edge in described end face (2) both sides is provided with sidewall (3), it is characterized in that described end face (2) is provided with at least two post cores (4) that extend out, the magnetic sheet (5) that can lean against on sidewall (3) and post core (4) end face, described post core (4) end face and magnetic sheet (5) directly maintain magnetic gap (11).
2. magnetic core according to claim 1 is characterized in that described two sidewalls (3) prolong end face (2) edge on one side and extend rear wall (6), forms holistic half.
3. magnetic core, comprise two magnets (1), described magnet (1) is provided with an end face (2), edge in described end face (2) both sides is provided with sidewall (3), it is characterized in that described end face (2) is provided with at least two post cores (4) that extend out, one is arranged on the magnetic sheet (5) that can lean against between two magnets (1) on sidewall (3) and post core (4) end face, and described post core (4) end face and magnetic sheet (5) directly maintain magnetic gap (11).
4. magnetic core according to claim 1 is characterized in that described two sidewalls (3) prolong end face (2) edge on one side and extend rear wall (6), forms holistic half.
5. integrated inductor, comprise a magnet (1), described magnet (1) is provided with an end face (2), edge in described end face (2) both sides is provided with sidewall (3), it is characterized in that described end face (2) is provided with at least two post cores (4) that extend out, the magnetic sheet (5) that can lean against on sidewall (3) and post core (4) end face, described post core (4) end face and magnetic sheet (5) directly maintain magnetic gap (11), first coil (7) that on each post core (4), is provided with and second coil (8), first coil (7) on each post core (4) is series connection mutually, second coil (8) on each post core (4) is series connection mutually, and the two ends of each coil are separately positioned on the pin (9).
6. integrated inductor according to claim 5 is characterized in that described two sidewalls (3) prolong end face (2) edge on one side and surround a whole shape.
7. according to claim 5 or 6 described integrated inductors, it is characterized in that being arranged with on the described post core (4) coil rack (10), described pin (9) is arranged on coil rack (10), and first coil (7) of the above and second coil (8) are wound on the coil rack (10).
8. integrated inductor, comprise two magnets (1), described magnet (1) is provided with an end face (2), edge in described end face (2) both sides is provided with sidewall (3), it is characterized in that described end face (2) is provided with at least two post cores (4) that extend out, one is arranged on the magnetic sheet (5) that can lean against between two magnets (1) on sidewall (3) and post core (4) end face, described post core (4) end face and magnetic sheet (5) directly maintain magnetic gap (11), first coil (7) that on each post core (4), is provided with and second coil (8), first coil (7) on each post core (4) is series connection mutually, second coil (8) on each post core (4) is series connection mutually, and the two ends of each coil are separately positioned on the pin (9).
9. magnetic core according to claim 8 is characterized in that described two sidewalls (3) prolong end face (2) edge on one side and surround a whole shape.
10. according to Claim 8 or 9 described integrated inductors, it is characterized in that being arranged with on the described post core (4) coil rack (10), described pin (9) is arranged on coil rack (10), and first coil (7) of the above and second coil (8) are wound on the coil rack (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200446050U CN201160024Y (en) | 2008-03-07 | 2008-03-07 | Magnetic core and integrated electrical inductance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200446050U CN201160024Y (en) | 2008-03-07 | 2008-03-07 | Magnetic core and integrated electrical inductance |
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| CN201160024Y true CN201160024Y (en) | 2008-12-03 |
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| CNU2008200446050U Expired - Fee Related CN201160024Y (en) | 2008-03-07 | 2008-03-07 | Magnetic core and integrated electrical inductance |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2011011966A1 (en) * | 2009-07-31 | 2011-02-03 | 株式会社田村制作所 | Inductor |
| CN101499364B (en) * | 2008-10-20 | 2012-06-27 | 天通浙江精电科技有限公司 | Magnetic core and integrated electrical inductance |
| CN107437456A (en) * | 2016-05-25 | 2017-12-05 | 台达电子企业管理（上海）有限公司 | Core structure and magnetic element |
| CN107437885A (en) * | 2016-05-25 | 2017-12-05 | 台达电子企业管理（上海）有限公司 | Power module and supply unit |
| US11189415B2 (en) * | 2017-07-13 | 2021-11-30 | Delta Electronics (Shanghai) Co., Ltd | Magnetic element and switching power supply using the same |
| US11901108B2 (en) | 2016-05-25 | 2024-02-13 | Delta Electronics (Shanghai) Co., Ltd. | Power module and power device |
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2008
- 2008-03-07 CN CNU2008200446050U patent/CN201160024Y/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499364B (en) * | 2008-10-20 | 2012-06-27 | 天通浙江精电科技有限公司 | Magnetic core and integrated electrical inductance |
| WO2011011966A1 (en) * | 2009-07-31 | 2011-02-03 | 株式会社田村制作所 | Inductor |
| CN102326216A (en) * | 2009-07-31 | 2012-01-18 | 株式会社田村制作所 | Inductor |
| EP2461334A1 (en) * | 2009-07-31 | 2012-06-06 | Tamura Corporation | Inductor |
| EP2461334A4 (en) * | 2009-07-31 | 2013-01-09 | Tamura Seisakusho Kk | Inductor |
| CN102326216B (en) * | 2009-07-31 | 2016-03-16 | 株式会社田村制作所 | Inductor |
| CN107437456A (en) * | 2016-05-25 | 2017-12-05 | 台达电子企业管理（上海）有限公司 | Core structure and magnetic element |
| CN107437885A (en) * | 2016-05-25 | 2017-12-05 | 台达电子企业管理（上海）有限公司 | Power module and supply unit |
| US10784034B2 (en) | 2016-05-25 | 2020-09-22 | Delta Electronics (Shanghai) Co., Ltd | Core structure and magnetic device |
| US10847455B2 (en) | 2016-05-25 | 2020-11-24 | Delta Electronics (Shanghai) Co., Ltd | Power module and power device |
| CN107437456B (en) * | 2016-05-25 | 2021-03-23 | 台达电子企业管理（上海）有限公司 | Magnetic core structure and magnetic element |
| CN113035523A (en) * | 2016-05-25 | 2021-06-25 | 台达电子企业管理（上海）有限公司 | Magnetic core structure and magnetic element |
| US11901108B2 (en) | 2016-05-25 | 2024-02-13 | Delta Electronics (Shanghai) Co., Ltd. | Power module and power device |
| US11189415B2 (en) * | 2017-07-13 | 2021-11-30 | Delta Electronics (Shanghai) Co., Ltd | Magnetic element and switching power supply using the same |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081203 Termination date: 20110307 |